Do not push deletes for refs configured to be skipped

When pushing a delta set of refs, instead of treating non-existent and
!canPush() refs the same, use the same logic as when pushing all refs
and log and skip any !canPush() refs.

Release-Notes: refs configured to be skipped are not pushed as deletes
Change-Id: I3491c907580b16ea23493a5eaa325d2ef7d6d108

src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java b/src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java
index b516fc7..c49890a 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java
@@ -742,8 +742,12 @@
           srcRef = git.exactRef(src);
         }
 
-        if (srcRef != null && canPushRef(src, noPerms)) {
-          push(cmds, spec, srcRef);
+        if (srcRef != null) {
+          if (canPushRef(srcRef.getName(), noPerms)) {
+            push(cmds, spec, srcRef);
+          } else {
+            repLog.atFine().log("Skipping push of ref %s", srcRef.getName());
+          }
         } else if (config.isMirror()) {
           delete(cmds, spec);
         }